Reductive-Cyclization-Mediated Synthesis of Fused Polycyclic Quinolines from Baylis-Hillman Adducts of Acrylonitrile: Scope and Limitations
作者:Virender Singh、Samiran Hutait、Sanjay Batra
DOI:10.1002/ejoc.200900336
日期:2009.7
The synthesis of a variety of polycyclic quinolines is described. The target molecules were obtained in two steps by an initial reductive cyclization followed by another intramolecular cyclization in the allylamines afforded from either the acetates or allyl bromides of Baylis–Hillman adducts of 2-nitrobenzaldehydes and acrylonitrile. The two steps proceeded in one-pot for those substrates in which
描述了多种多环喹啉的合成。目标分子分两步获得,首先还原性环化,然后在由 2-硝基苯甲醛和丙烯腈的 Baylis-Hillman 加合物的乙酸酯或烯丙基溴提供的烯丙胺中进行另一次分子内环化。对于甲酰基或羟基在第二次分子内环化中与2-氨基喹啉的氨基反应的那些底物,这两个步骤在一锅中进行。相比之下,在烷氧基羰基和氨基参与的底物中进行第二次分子内环化反应需要碱性介质。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)